Created
December 19, 2023 23:29
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pub struct Lines<'a> { | |
bytes: &'a [u8], | |
} | |
impl<'a> Iterator for Lines<'a> { | |
type Item = &'a [u8]; | |
fn next(&mut self) -> Option<Self::Item> { | |
self.bytes.take_line() | |
} | |
} | |
impl<'a> std::iter::FusedIterator for Lines<'a> {} | |
pub trait IntoLines { | |
fn 行(&self) -> Lines<'_>; | |
} | |
impl<T: AsRef<[u8]>> IntoLines for T { | |
fn 行(&self) -> Lines<'_> { | |
Lines { | |
bytes: self.as_ref(), | |
} | |
} | |
} | |
pub trait TakeLine<'b> { | |
fn take_line<'a>(&'a mut self) -> Option<&'b [u8]>; | |
} | |
impl<'b> TakeLine<'b> for &'b [u8] { | |
fn take_line<'a>(&'a mut self) -> Option<&'b [u8]> { | |
match memchr::memchr(b'\n', self) { | |
None if self.is_empty() => None, | |
None => { | |
let line = *self; | |
*self = b""; | |
Some(line) | |
} | |
Some(end) => { | |
let line = &self[..end]; | |
*self = &self[end + 1..]; | |
Some(line) | |
} | |
} | |
} | |
} | |
impl<'b> TakeLine<'b> for &'b str { | |
fn take_line<'a>(&'a mut self) -> Option<&'b [u8]> { | |
match memchr::memchr(b'\n', self.as_bytes()) { | |
None if self.is_empty() => None, | |
None => { | |
let line = self.as_bytes(); | |
*self = ""; | |
Some(line) | |
} | |
Some(end) => { | |
let line = self[..end].as_bytes(); | |
*self = &self[end + 1..]; | |
Some(line) | |
} | |
} | |
} | |
} |
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